Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface; and,

FIG. 2 is a front view of a second embodiment of the display screen with a graphical user interface.

The outermost broken lines illustrate the display screen. The remaining broken lines illustrate portions of the graphical user interface. None of the broken lines form part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 